Blurring The Boundaries: The Declining Significance of Age

Over the decades, the lines separating young- middle-aged-, and older adults have blurred, as indicated by a broadening of the appropriate years for making life decisions. Not only are many people marrying later, but some are marrying earlier than ever. Overall, women giving birth later, but some are having children earlier in their lives. Older people are retiring later, but some are retiring at a younger age. The spread or variability (standard deviation) of age-based decisions has increa...